Wattmeter or similar housing



FIG. 1 is top and right front perspective view of a wattmeter or similar article showing my new design;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a wattmeter or similar article, substantially as shown. 